Aprototypechain ranges from the base object class in the chain, known as thesuperclassdown to the lower classes orsubclasses.

All of the following are methods of the ArrayList class except:

a. length() b. size() c. set() d. get()

The ____________________ value of the use attribute means that the use of the attribute is optional with the element.

Fill in the blank(s) with the appropriate word(s).